Waterproofing material and method of making the same



Patented Sept. 12,1944 2 353 149 um'rao STATES PATENT OFFICE WATERPROOFING MATERIAL AND METHOD OF MAKING THE SAME Lloyd F. Bramble. Chicago, 111., assignor to Trnmbull Asphalt Com-m7. Chicago, 111., a corporation of Illinois No Drawing. Application M a2, 1939,

Serial No. 215,105 Z-Claims. (or. 117-168) Preferably the pressure tar has the following characteristics:

Melting point (ball and ring methterproofing porous material. such as insulating M) 110450 boards, papers, fabrics, and the like, by surface 6 penetmflon at F 30 application or impregnation or both. viscosity (saybolt Futon at I Among the features of my invention is the E "seconds" 75 making of awaterproofing material from pe- Y troleum products which is highly moisture The vacuum reduced or steam refined residual sistant and adhesive. My improved material, 10 flux 0r asphalt must have the following charafter application soon hardens sufiiciently so that it is no longer sticky or tacky. Coated material,

acteristics:

Melting point (ball and ring meththerefore, can be stacked, rolled, or piled with- 0d) F' 40. 300

o t use of any a -st c m di t ti a 77 F 10- 350 It has long been customary to use asphalt for viscosity (Say-Don Flu-o1) at waterproofing felts, insulating boards, papers, "seconds" 504000 a the by applying a surface Pppncatlon or Preferably the vacuum reduced residual flux has y impregnation, either totally or in part, as by means of dipping, coating, and the like. However, the followmg characteflstws' due to the characteristic sticky or tacky surface Melting point (ball and ring meth-.

nature of asphalt, other surface material such 0d) F..- 80-110 as finely divided clays, micas, and the like, or Penetration at 77 F 80l20 paint or other organic or inorganic substances ViScOSitY (Saybolt Fuml) at have heretofore been used on the coated surfaces to prevent surface sticking or cohesion when the treated material was shipped, Packed, or otherwise handled. In the practice of my invention, my new waterproofing material, shortly after application, is sufflciently non-sticky or non-tacky so that the treated material can readily be stacked, shipped, or otherwise handled.

It has also been known that waxes or other ingredients may be incorporated with asphalts to induce or promote a surface which does not require any superficial application for prevention of adhesion or sticking of surfaces. My invention is entirely novel and unique, however, in the fact that only asphalts or asphaltic materials are used. This reduces the cost of manufacture. Products treated with my improved material may be stacked, rolled, or piled together without substantial evidence of undesirable sticking.

In the practice of my invention I mix pressure tar, for example, such as used for a binder in the making of briquettes, with a vacuum reduced residual flux or a steam reduced asphalt or flux oil. The tar and asphalt .or flux are mixed substantially in the proportions of half and half by weight, although variations are permitted by which the proportions may be varied from half and half to %-70% each way.

The pressure tar used must have the following characteristics:

Melting point (ball and ring meth- F -seconds 200-500 The tar and residual flux or asphalt are melted and thoroughly mixed. The liquid mixture is then processed or hardened by blowing air therethrough, such process being well known in the art of treating asphalts, tars, and the like, and commonly referred to as oxidation or polymerization or condensation.

The completed product has a melting point from 200 to 300 F. (ball and ring method); penetration at 77 F. from 0 to 10; and viscosity (Say-bolt Furol) at 425 F. from to 300 seconds. The viscosity preferably will lie between and 200 seconds.

Another important feature of the invention is the improved packaging of material impregnated with my new waterproofing composition. Heretofore in packaging coated or impregnated sheet material or fabric" layers in juxtaposition, undesirable sticking -frequently occurred unless the layers were coated with some other material to prevent such sticking. In the practice of my invention, for example, a strip of roofing paper may be'impregnated with my improved material and then formed into a roll and thus packaged without any undue sticking of adjacent layers; so that when ready for use the material can be easily unwound without any damage or tearing. Likewise, sheets of wall board, papers, fabrics, insulating boards and other sheet material may be coated or partially or completely impregnated and a plurality of the same packaged od) F 100200 with adjacent sheets in contact, without any un- Penetration at 77 F 5 due sticking. Viscosity (Saybolt Furol) at 325 I claim:

F. second s 10-250 0 1. A package containing rigid sheet material with layers in contact, said layers being impregnated with asphalt waterproofing composition, said composition on each layer being cohesive to itself and adhesive to the sheet material, but the composition on one layer being non-adhesive to the composition on the contacting layer, said composition being an air-blown material, having a melting point from 200 to 300 FL, penetration at 77 F. from to 10, and viscosity at 425 1'. from 75 to 300 seconds.

2. A composition or matter com rising rigid sheet material, a surface 0! which is coated with a mixture or pressure tar having a melting point (ball and ring method) from 100 to 200 F., penetration at 77 F. from 2 to 50, viscosity (Say- .bolt Furol) at 325 F. from 10 to 250 seconds; and partial pressure reduced residual flux having a melting point (ball and ring method) from to 200 F., penetration at 77 F. from 10 to 350, viscosity (Saybolt Furol) at 212 F. from to 5000 seconds; said mixture having been polymerized until it has a melting point (ball and ring method) from 200 to 300 F., penetration at 77 F. from 0 to 10, and viscosity (Saybolt Furol) at 425 F. from to 300 seconds.

LLOYD F. BRAMBLE. 

